单侧后牙反患者的咀嚼肌肌电图分析  

Analysis of masticatory muscles electromyography of the patients with unilateral posterior crossbite

作　　者：李齐宏[1] 李东[1] 段银钟[1] 

机构地区：[1]西安第四军医大学口腔医院正畸科,710032

出　　处：《实用口腔医学杂志》2008年第2期232-235,共4页Journal of Practical Stomatology

摘　　要：目的:通过对单侧后牙反患者咀嚼肌肌电检查,分析单侧后牙反对咀嚼功能的影响。方法:用肌电图仪记录20例(男11例,女9例)单侧后牙反患者和20例(男10例,女10例)正常对照组在下颌姿势位、紧咬和双侧咀嚼时咬肌和颞肌前束的肌电数据。计算咬肌的活动不对称指数(ASMM)和颞肌前束的活动不对称指数(ASTA),然后进行统计学分析。结果:在紧咬和双侧咀嚼时,单侧后牙反组咬肌和颞肌前束肌电值明显低于对照组(P<0.05),反侧明显低于非反侧;单侧后牙反组与对照组ASMM和ASTA在紧咬和双侧咀嚼时有显著性差异(P<0.05);单个后牙反组与多个后牙反组ASMM和ASTA在紧咬和双侧咀嚼时有显著性差异(P<0.05)。结论:单侧后牙反对咀嚼肌功能有明显的影响,应对其进行积极治疗。Objective：To study the effects of unilateral posterior crossbite on masticatory muscle functions pattern by using electromyography（EMG）.Methods：20 subjects（11 males and 9 females）with unilateral posterior crossbite were selected.Subjects were instructed to stay mandibular postural position and to make maximum bite in intercuspal position（ICP）and bilateral chewing.EMG data of the left and right masseter and anterior temporalis muscles were recorded.Asymmetry index of masseter muscles（ASMM） and asymmetry index of temporalis muscles（ASTA）were calculated and compared.20 subjects with individual normal occlusion were used as control.Results：Compared to control group,masseter and temporal muscle activities in unilateral posterior crossbite group were lower in maximum bite and bilateral chewing;The activities of two muscles at crossbite side were lower than that at noncrossbite side.Under maximum bite and bilateral chewing,ASMM and ASTA in unilateral posterior crossbite group were significantly higher than those in control group;ASMM and ASTA in Subjects with one posterior tooth crossbite is lower than subjects with several teeth crossbite.Conclusion：It can be suggested that unilateral posterior crossbite may damage the function of mastication muscle.

关 键 词：单侧后牙反[牙合]咀嚼肌 肌电图分析 

分 类 号：R783.5[医药卫生—口腔医学]